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Are you adding the specs from MS Excel or something similar ?
If you do, do not use insert cells command.
Go to first cell of begining of a raw and use insert raws function.
On the blank raw, write your new ship specs (or copy-pste them, but oly on blank row, because otherwise, the column-raw matrix of the file will change and the specs will not match any more).
As for the shield pack... install latest patch from
http://starfleetcommand3.filefront.com; it has different shield colors enabled.